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A platform for research: civil engineering, architecture and urbanism
Compressive Strength and Water Absorption of Limestone Calcined Clay Cement Concrete with Recycled Fine Aggregate
Limestone calcined clay cement (LC3) is one of the most promising technological breakthroughs for high-performance ternary blended cement. This is due to its significantly lower quantities of clinker and lower carbon emissions compared to conventional concrete with great potential to be adopted as a cement alternative globally. Recycled fine aggregate (RFA) is often considered the least preferred option for concrete recycling, with numerous sources highlighting their adverse impact on critical concrete properties, including compressive and tensile strength, modulus of elasticity, water absorption, shrinkage, carbonation, and chloride penetration. In this study, five mixes were made: the control (without limestone calcined clay), the LC3 mix, and the LC3 mix with 25%, 50%, and 100% recycled fine aggregate as a replacement for natural sand. Concrete specimens were prepared at a water-to-binder ratio of 0.55, and tests were performed to investigate the effect of RFA on the compressive strength and water absorption of LC3 concrete. The findings indicate that the total replacement of natural sand with unwashed RFA increases the compressive strength and reduces the water absorption of LC3 concrete by 9% and 14%, respectively.
Compressive Strength and Water Absorption of Limestone Calcined Clay Cement Concrete with Recycled Fine Aggregate
Limestone calcined clay cement (LC3) is one of the most promising technological breakthroughs for high-performance ternary blended cement. This is due to its significantly lower quantities of clinker and lower carbon emissions compared to conventional concrete with great potential to be adopted as a cement alternative globally. Recycled fine aggregate (RFA) is often considered the least preferred option for concrete recycling, with numerous sources highlighting their adverse impact on critical concrete properties, including compressive and tensile strength, modulus of elasticity, water absorption, shrinkage, carbonation, and chloride penetration. In this study, five mixes were made: the control (without limestone calcined clay), the LC3 mix, and the LC3 mix with 25%, 50%, and 100% recycled fine aggregate as a replacement for natural sand. Concrete specimens were prepared at a water-to-binder ratio of 0.55, and tests were performed to investigate the effect of RFA on the compressive strength and water absorption of LC3 concrete. The findings indicate that the total replacement of natural sand with unwashed RFA increases the compressive strength and reduces the water absorption of LC3 concrete by 9% and 14%, respectively.
Compressive Strength and Water Absorption of Limestone Calcined Clay Cement Concrete with Recycled Fine Aggregate
RILEM Bookseries
Beushausen, Hans (editor) / Ndawula, Joanitta (editor) / Alexander, Mark (editor) / Dehn, Frank (editor) / Moyo, Pilate (editor) / Mhene, Tafadzwa Mthokozisi (author) / Babafemi, Adewumi John (author)
International Conference on Concrete Repair, Rehabilitation and Retrofitting ; 2024 ; Cape Town, South Africa
2024-11-01
9 pages
Article/Chapter (Book)
Electronic Resource
English